linux/drivers/tty, branch v4.11

Revert "tty: don't panic on OOM in tty_set_ldisc()"

2017-04-14T08:59:56Z

This reverts commit 5362544bebe85071188dd9e479b5a5040841c895 as it is reported to cause a reproducable crash. Fixes: 5362544bebe8 ("tty: don't panic on OOM in tty_set_ldisc()") Reported-by: Vegard Nossum Cc: Dmitry Vyukov Cc: Cc: Greg Kroah-Hartman Cc: Jiri Slaby Cc: Peter Hurley Cc: One Thousand Gnomes Cc: Linus Torvalds Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-04-02T16:25:10Z

Pull scheduler fixes from Thomas Gleixner: "This update provides: - make the scheduler clock switch to unstable mode smooth so the timestamps stay at microseconds granularity instead of switching to tick granularity. - unbreak perf test tsc by taking the new offset into account which was added in order to proveide better sched clock continuity - switching sched clock to unstable mode runs all clock related computations which affect the sched clock output itself from a work queue. In case of preemption sched clock uses half updated data and provides wrong timestamps. Keep the math in the protected context and delegate only the static key switch to workqueue context. - remove a duplicate header include" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/headers: Remove duplicate #include line sched/clock: Fix broken stable to unstable transfer sched/clock, x86/perf: Fix "perf test tsc" sched/clock: Fix clear_sched_clock_stable() preempt wobbly

tty: pl011: fix earlycon work-around for QDF2400 erratum 44

2017-04-01T09:07:29Z

The work-around for the Qualcomm Datacenter Technologies QDF2400 erratum 44 sets the "qdf2400_e44_present" global variable if the work-around is needed. However, this check does not happen until after earlycon is initialized, which means the work-around is not used, and the console hangs as soon as it displays one character. Fixes: d8a4995bcea1 ("tty: pl011: Work around QDF2400 E44 stuck BUSY bit") Signed-off-by: Timur Tabi Signed-off-by: Greg Kroah-Hartman

serial: 8250_EXAR: fix duplicate Kconfig text and add missing help text

2017-03-31T15:26:20Z

In commit d0aeaa83f0b0f7a92615bbdd6b1f96812f7dcfd2 ("serial: exar: split out the exar code from 8250_pci") the exar driver got its own Kconfig. However the text for the new option was never changed from the original 8250_PCI text, and hence it appears confusing when you get asked the same question twice: 8250/16550 PCI device support (SERIAL_8250_PCI) [Y/n/m/?] (NEW) 8250/16550 PCI device support (SERIAL_8250_EXAR) [Y/n/m] (NEW) Adding to the confusion, is that there is no help text for this new option to indicate it is specific to a certain family of cards. Fix both issues at the same time, as well as the space vs. tab issues introduced in the same commit. Fixes: d0aeaa83f0b0 ("serial: exar: split out the exar code from 8250_pci") Cc: Jiri Slaby Cc: linux-serial@vger.kernel.org Signed-off-by: Paul Gortmaker Acked-by: Sudip Mukherjee Reviewed-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman

tty/serial: atmel: fix TX path in atmel_console_write()

2017-03-31T15:26:20Z

A side effect of 89d8232411a8 ("tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_tx") is that the console can be called with TX path disabled. Then the system would hang trying to push charecters out in atmel_console_putchar(). Signed-off-by: Nicolas Ferre Fixes: 89d8232411a8 ("tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_tx") Cc: stable #4.4+ Acked-by: Richard Genoud Signed-off-by: Greg Kroah-Hartman

tty/serial: atmel: fix race condition (TX+DMA)

2017-03-31T15:26:19Z

If uart_flush_buffer() is called between atmel_tx_dma() and atmel_complete_tx_dma(), the circular buffer has been cleared, but not atmel_port->tx_len. That leads to a circular buffer overflow (dumping (UART_XMIT_SIZE - atmel_port->tx_len) bytes). Tested-by: Nicolas Ferre Signed-off-by: Richard Genoud Cc: stable # 3.12+ Signed-off-by: Greg Kroah-Hartman

serial: mxs-auart: Fix baudrate calculation

2017-03-31T15:26:19Z

The reference manual for the i.MX28 recommends to calculate the divisor as divisor = (UARTCLK * 32) / baud rate, rounded to the nearest integer , so let's do this. For a typical setup of UARTCLK = 24 MHz and baud rate = 115200 this changes the divisor from 6666 to 6667 and so the actual baud rate improves from 115211.521 Bd (error ≅ 0.01 %) to 115194.240 Bd (error ≅ 0.005 %). Signed-off-by: Uwe Kleine-König Cc: stable Signed-off-by: Greg Kroah-Hartman

sched/headers: Remove duplicate #include line

2017-03-28T07:56:03Z

Vito Caputo reported that the sched.h split-up series introduced a duplicate #include line in drivers/tty/vt/keyboard.c. Remove it. Reported-by: Vito Caputo Cc: Greg Kroah-Hartman Cc: Jiri Slaby Cc: Alan Cox Cc: Greg Kroah-Hartman Cc: Linus Torvalds Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

Merge tag 'tty-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2017-03-26T18:03:42Z

Pull tty/serial driver fixes from Greg KH: "Here are some tty and serial driver fixes for 4.11-rc4. One of these fix a long-standing issue in the ldisc code that was found by Dmitry Vyukov with his great fuzzing work. The other fixes resolve other reported issues, and there is one revert of a patch in 4.11-rc1 that wasn't correct. All of these have been in linux-next for a while with no reported issues" * tag 'tty-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: fix data race in tty_ldisc_ref_wait() tty: don't panic on OOM in tty_set_ldisc() Revert "tty: serial: pl011: add ttyAMA for matching pl011 console" tty: acpi/spcr: QDF2400 E44 checks for wrong OEM revision serial: 8250_dw: Fix breakage when HAVE_CLK=n serial: 8250_dw: Honor clk_round_rate errors in dw8250_set_termios

Merge tag 'gpio-v4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

2017-03-21T20:01:53Z

Pull GPIO fixes from Linus Walleij: "Here is the first set of GPIO fixes for 4.11. It was delayed a bit beacuse I was chicken when linux-next was not rotating last week. This hits the ST serial driver in drivers/tty/serial and that has an ACK from Greg, he suggested to keep the old GPIO fwnode API around to smoothen things in the merge Windod and those have now served their purpose so we take them out and convert the last driver to the new API. Apart from that it's fixes as usual. Summary: - set the parent on the Altera A10SR driver, also fix high level IRQs. - fix error path on the mockup driver. - compilation noise about unused functions fixed. - fix missed interrupts on the MCP23S08 expander, this is also tagged for stable. - retire the interrim helpers devm_get_gpiod_from_child() used to smoothen merging in the merge window" * tag 'gpio-v4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio:mcp23s08 Fixed missing interrupts serial: st-asc: Use new GPIOD API to obtain RTS pin gpio: altera: Use handle_level_irq when configured as a level_high gpio: xgene: mark PM functions as __maybe_unused gpio: mockup: return -EFAULT if copy_from_user() fails gpio: altera-a10sr: Set gpio_chip parent property